I'm happy to put up with the ads, as I only use catch up so don't pay for a licence, some of which goes to channel 4. I use ad time to browse mumsnet and go on Facebook on my phone. (I use all4 on my TV)

Yanbu it's impossible. I watch ads in order to try a new programme. Decide I don't like it. Watch more ads to watch another. Don't like that either but can't be arsed with more ads so give up. I think it's better than it was. But do the ad breaks get longer the more you watch? It seems like it.